package day20171221;

import java.io.*;
import java.util.HashMap;
import java.util.Map;
import java.util.regex.Matcher;
import java.util.regex.Pattern;

/**
 * Created by ASUS on 2017/12/21.
 */
public class Test04 {
    public static void main(String[] args) throws IOException {
        Map<String, Integer> map = new HashMap<>();

        //  字符流读文件

        BufferedReader reader = null;
        try {
            reader = new BufferedReader(new FileReader("d:\\names.txt"));

            String stuNo = null;
            while ((stuNo = reader.readLine()) != null) {
                map.put(stuNo, 0);
            }


        } catch (FileNotFoundException e) {
            e.printStackTrace();
        } catch (IOException e) {
            e.printStackTrace();
        } finally {
            try {
                reader.close();
            } catch (IOException e) {
                e.printStackTrace();
            }
        }

    //  得到某一个文件夹下面所有的文件
        File file = new File("d:\\16信本2班Java作业一");

        File[]files = file.listFiles();

        //  遍历
        for(File f: files){
            String fileName = f.getName();
            String no = null;


            Matcher matcher = Pattern.compile("信本2班(\\d+)").matcher(fileName);
            while(matcher.find()){
                no = matcher.group(1);
            }
        map.put(no,1);

        }
    //  打印所有value为0
        for (Map.Entry<String,Integer>entry : map.entrySet()){
            if (entry.getValue() == 0){
                System.out.println(entry.getKey());
            }

        }

    }
}
